Prevalence of antibodies against equine viral arteritis virus in Northwest, Western Central and North Central Regions of the State of Paraná, Brazil

ABSTRACT: The prevalence of antibodies against equine viral arteritis virus (EVAV) in healthy horses raised in Northwest, Western Central and North Central regions of the State of Paraná, Brazil was investigated. According to calculated sample size, serum samples of 653 horses were analyzed through standard virus neutralization test. No horse had antibodies to EVAV in Northwest (0/236) and in Western Central (0/99) regions. In North Central region frequency was 0.62% (2/318), with an overall prevalence of 0.30%. It can be concluded that EVA does not represent a problem of epidemiological importance in the studied regions of Paraná.

摘要：本研究针对巴西巴拉那州西北部、中西部西部及中北部地区饲养的健康马群，调查了抗马病毒性动脉炎病毒（equine viral arteritis virus，EVAV）抗体的流行情况。根据样本量计算结果，本研究采用标准病毒中和试验（virus neutralization test）对653份马血清样本进行了检测。结果显示，西北部（0/236）与中西部西部（0/99）区域未检出EVAV抗体阳性样本；中北部区域的抗体阳性率为0.62%（2/318），整体阳性率为0.30%。综上可知，在本次研究涉及的巴拉那州区域内，马病毒性动脉炎（equine viral arteritis，EVA）尚未构成具有流行病学意义的问题。